A QUEDA DO IMPÉRIO :

Wall Street Journal - JULY 17, 2010
Cidades trocam asfalto por cascalho, estradas arruinadas.
clique aqui Roads to Ruin: Asphalt Replaced By Cheaper Gravel; 'Back to Stone Age' .
In Michigan, at least 38 of the 83 counties have converted some asphalt roads to gravel in recent years. Last year, South Dakota turned at least 100 miles of asphalt road surfaces to gravel. Counties in Alabama and Pennsylvania have begun downgrading asphalt roads to cheaper chip-and-seal road, also known as "poor man's pavement." Some counties in Ohio are simply letting roads erode to gravel. The moves have angered some residents because of the choking dust and windshield-cracking stones that gravel roads can kick up, not to mention the jarring "washboard" effect of driving on rutted gravel.